Ground Force manufactures tuned-performance suspension systems for light trucks, SUVs, crossovers, and performance muscle cars. The company says it has nearly three decades of experience, with its systems and components made at its Mount Braddock, Pennsylvania facility using materials manufactured in the USA. Its engineers work alongside original-equipment automotive manufacturers on suspension development.
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Spohn Performance, IncSince 1999, Spohn Performance has designed and manufactured high-performance suspension, chassis and drivetrain components for muscle cars and trucks from its 27,000-square-foot facility in Myerstown, Pennsylvania. Its skilled craftsmen also build custom parts such as control arms and chrome-moly driveshafts, with a focus on detailed fabrication and value. Spohn is a member of the SEMA Motorsports Parts Manufacturer Council.MYERSTOWN, PA
UMI PerformanceUMI Performance manufactures aftermarket suspension and chassis components for classic and modern muscle cars and trucks, with a particular focus on GM platforms such as Camaro, Firebird, Chevelle and C10/C15 pickups. Based in Philipsburg, Pennsylvania, the company also supports customers with kit recommendations, installation help and troubleshooting from its technical team.PHILIPSBURG, PA
Triangle Suspension Systems, IncTriangle Suspension Systems, Inc. makes undercarriage products for heavy-, medium- and light-duty trucks and trailers, including steel leaf springs manufactured in the United States. Founded in 1919, the company traces its roots to Pittsburgh’s Golden Triangle and moved its operations to DuBois, Pennsylvania, in 1927; it reports that its products are backed by ISO-registered facilities and distributed through a nationwide network.DU BOIS, PA
Martz ChassisSince 1970, family-owned Martz Chassis has built custom performance suspension systems and chassis for street rods, muscle cars and other enthusiast vehicles in Bedford, Pennsylvania. Founded by racing mechanic and engineer Gary Martz, the company remains under the leadership of his son Andy, carrying a generation of racing-derived chassis knowledge into custom fabrication and installation work.BEDFORD, PA